//package com.pj.current;
//
//import java.io.IOException;
//
//import javax.servlet.Filter;
//import javax.servlet.FilterChain;
//import javax.servlet.FilterConfig;
//import javax.servlet.ServletException;
//import javax.servlet.ServletRequest;
//import javax.servlet.ServletResponse;
//import javax.servlet.http.HttpServletRequest;
//import javax.servlet.http.HttpServletResponse;
//
//import org.springframework.stereotype.Component;
//
///**
// * 跨域过滤器
// */
//@Component
//public class CorsFilter implements Filter {
//
//    public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {
//        HttpServletRequest request = (HttpServletRequest) req;
//        HttpServletResponse response = (HttpServletResponse) res;
//
//        String origin = request.getHeader("Origin");    // 获得客户端domain
//        if(origin == null) {
//            origin = request.getHeader("Referer");
//        }
//        response.setHeader("Access-Control-Allow-Origin", origin);            // 允许指定域访问跨域资源
//        response.setHeader("Access-Control-Allow-Credentials", "true");       // 允许客户端携带跨域cookie，此时origin值不能为“*”，只能为指定单一域名
//        response.setHeader("Access-Control-Allow-Methods", "POST, GET, OPTIONS, DELETE");
//        response.setHeader("Access-Control-Max-Age", "3600");
//        response.setHeader("Access-Control-Allow-Headers", "x-requested-with,satoken");	// 允许的header参数 
////        response.setHeader("Access-Control-Allow-Headers", "*");  // 允许的header参数 
//        
//        // 如果是预检请求，直接返回 
//		if(request.getMethod().equals("OPTIONS")) {	
//			System.out.println("=======================浏览器发来了OPTIONS预检请求==========");
//			response.getWriter().print("");
//			return;	
//		}
//
//        //System.out.println("*********************************过滤器被使用**************************2233");
//        chain.doFilter(req, res);
//    }
//    public void init(FilterConfig filterConfig) {}
//    public void destroy() {}
//
//
//}
